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1927. 1,634,205 June R. E. OLSON 'COMBINED RECORDING AND CONTROLLING MECHANISM Filed April 18, 1925 44 ii] 17 I F295 56k. 1g '39 4 4g 46 391 r N 5 Z3 5 gwuznto'c @MMJN- Patented June 28, 1927.

UNITED STATES PATENT OFFICE.

RAYMOND E. OLSON, OF ROCHESTER, YORK, ASSIGNOR TO TAYLOR INSTRUMENT COMPANIES, OF ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

COMBINED RECORDING AND CONTROLLING MECHANISM.

Application filed April 18, 1925. Serial No. 24,242.

This invention relates to recording and controlling mechanism of the variety adapted for use for example, in conjunction with wood drying kilns and the like, for automatically recording and controllin the op' form of construction from the point of view of manufacture and maintenance.

To these and other ends the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings Figure 1 is a front elevation of a temperature or pressure recording instrument having the present invention applied thereto, partly broken away for clearer illustration;

Figure 2 is an enlarged View of a portion of Fig. 1, with a control device or auxiliary valve shown in section; and

Fi ure 3 is an enlarged sectional view on the line 3-3 in Figure 1.

Similar reference numerals throughout the several views indicate the same parts.

The present embodiment of the invention comprises a temperature or pressure recording mechanism of the well known 'variet having a rotary record chart holder, or dis 5, mounted on a spindle 6 driven by a time mechanism or clock indicated generally at 7 and carried on the rear wall of a case or' housing 8 enclosing the mechanism. The holder or disk 5 is adapted to detachably receive and support a record chart 9 and is frictionally or otherwise adjustably mounted on the spindle 6 of the clock for purposes of adjustment and removal. At 10 is a marking means or pen carried by an arm 11 actuated by any known or suitable means in the casing extension 12, for pivotally swinging the pen arm in response to variations in a A further ob-' the control device. one or a plurality of actuating elements may temperature or pressure condition with which the instrument is connected as by means of a transmissions tube 13 as well understood in the art. The chart as shown is graduated circumferentially to represent divisions of time and is graduated in a sub stantially radial direction marked off by concentric circles to represent different tem-- peratures or pressures as indicated by the movement of the pen. As the recording mechanism may have any suitable form of the general character described well known in the art, as described and shown, for example, in the patent to Hod kinson No. 1,063,349," granted June 3, 1913, or indicator and recorder, a detailed description of the same appears unnecessary.

The invention comprises the combination with a recording mechanism of the above type of a control device such, for example, as an auxiliary or relay fluid pressure valve arranged for actuation by one or more actuating elements driven by the recorder time means and of a readily adjustable character to vary the time and duration of actuation of It has been found that be compactly mounted for circumferential adjustment on the periphery of the chart disk 5 itself for actuating the control device at one or any number of predetermined times in a given period as, for example, to intermittently operate a main valve through the control device or auxiliary valve for supplying steam to a wood drying kiln at predetermined intervals, while the recording instrument simultaneously maintains a record of the condition in the kiln. The latter,

however, is referred to merely as one of various useful contemplated adaptations of the invention.

Preferably the control device'is mounted on the recorder casing, being in the present instance, as already stated, an auxiliary fluid pressure or compressed air valve comprising a block 14 secured on the top of the casing 8 as by means of screws 15. The valve block has an inlet port 16 adapted for the connection therewith of a pressure supply line 17 as shown. Port- 16 leads to a chainher 18 formed in the block through the top of the latter and closed at its upper end by means of a cap 19. At 20 in the bottom of the chamber is a valve seat leading to a channel 21 communicating with an outlet port 22 adapted for the connection therewith of a line 23 leading, for example, to an automatic diaphragm main valve of the apparatus to be controlled by the mechanism such as the steam line valve of a dry kiln. Cooperating with Valve seat 20 is a valve body 24 on a stem 25 projecting from the top and bottom of the valve body. The upper portion of stem 25 has a spring 26 coiled thereabout and housed in cap 19 with its lower end bearing against the valve to 'press the same toward its seat and normally maintain it in closed position. The other end of the valve stem, depending through channel 21, projects within the recorder casing for operation by the actuating elements on the chart disk. It is apparent that the raising of the valve stem, by the engagement therewith of an actuating element during rotation of the chart disk, serves to unseat the valve and transmit pressure to the line 23 for operating the apparatus to be controlled- The valve described above preferably has its outlet side or port 22 vented as by means of a small opening 27 in a plug 28 inserted in the valve block for the purpose of relieving pressure in the outlet line 23 after the valve is closed. Instead of a single relay valve, of course, a plurality of such valves may be employed, or the control device may take the form of a control switch of an electric circuit.

The actuating elements for the control dev1ce or valve are driven by the same time means or clock forming a part of the recorder and are ad'ustably positioned by reference to the in icia of the record chart. Preferably these actuating elements are mounted directly on the peripheryof the chart disk itself, being slidably adjustable circumferentially of the latter One or a luralit of such actuating elements may e emp oyed for producing a single or repeated operation of the valve at times determined by the selective adjustment or location of the elements with reference to the graduations of the chart. In the present instance a plurality of such elements are shown spaced about the circumference of the disk each in the form of a bracket 29, F1gure 3, having lugs 30 and 31 embracing the edge of the disk. These lugs are spaced from each other by a distance slight- 1% exceeding the thickness of the disk so t at the bracket is effectively supported for sliding movement on the latter and lug 31 is provided with a set screw 32 for clamping the bracket after adjustment. A rearwardly extending bracket arm 33 carries a radially projecting stud 34 threadedly mounted therein for extensible adjustments radially of the chart disk. These studs 34 are preferably arranged to engage with an arm 35 pivoted on the casing at 36 under the position of the valve block 14, so that during rotation of the recorder disk each element or stud 34:, in passing, contacts with and raises arm 35 which latter raises the valve stem 25 to open the valve. It is apparent'that the degree of radial extensions 'of each stud determines the length of time for whichv it holds the valve raised at the time of each engagement, so that at each actuation the valve may be opened for longer or shorter duration as desired.

In operation the chart is positioned on the recorder disk, either the chart or the chart and disk together being properly adjusted with reference to the registry of the pen with the proper time marking of the chart. The actuating elements or brackets 29 are then adjusted in position on the disk with reference to the time or times at which it is desired to operate the valve as determined by reference to the indicia of the chart. The bracket studs 34 are also extended or retracted to produce the appropriate duration of opening of the valve. The recorder clock being in operation, with the tube 13, for example, a capillary thermometer tube, arranged with its' end or bulb in the chamber of the apparatus to be controlled, the mechanism continuousl records the condition of the latter while the actuating elements open the auxiliary or control valve 14 at and for the desired time. The air pressure supplied through pipe 17 is thereby intermittently transmitted through the pipe 23 for operating a main diaphra valve of the apparatus to be controlle for admitting steam, for example, in the case of a dry kiln apparatus. The actuating devices are readily accessible and conveniently adjusted to effect automatic regulation in accordance with a desired schedule and with reference to the time markings or indicia of the chart on which a record of operation is simultaneously produced, both the recording and controlling functions being governed in the desired coordination by the common time means. The mechanism is simple, reliable and effective in construction and mode of operation and its simple, practical and compact construction renders it economical from the point of View of manufacture and maintenance.

I claim as my invention: a

1. In recording apparatus having a record chart holder, a motor for rotating the chart holder and a casing enclosing'the same, the combination of a device disposed outside the casing and means for operating the same, includin an element movable radially through the casing and an abutment constructed and arranged to be attached to the periphery of the chart holder for co-operation with the said element, said abutment including a contact member adjustable in radial direction.

2. In a recording apparatus having a recor'd chart holder, a motor for rotating the chart holder and a casing enclosin the same, the combination with the chart ho der, of an abutment constructed and arranged to be attached to the periphery of the chart holder and including a member adjustable in radial direction when the abutment is in position on the chart holder.

3. In recording apparatus having a record chart holder, a motor for rotating the chart holder and a combination of a device disposed outside the casing enclosing the same, the

casing and means for operating the same, inclu ing an element movable radially through the casing, a plate member hinged at one end on the casin and positioned peripherally thereof to intercept the movement of the said element and an abutment constructed and arranged to be attached to the periphery of the chart holder for co-operat-ion with said plate member and the said 20 element.

RAYMOND E. OLSON. 

